安装好centos 7 之后默认网卡名称是很长一窜（比如：eno16777736），有时候需要刚才eth0这样的格式，下面是配置方法。
重命名ifcfg-eno16777736文件为ifcfg-eth0
代码语言：javascript复制#cd /etc/sysconfig/network-scripts/
#mv ifcfg-eno16777736 ifcfg-eth0更改ifcfg-eth0文件
代码语言：javascript复制TYPE="Ethernet"
BOOTPROTO="dhcp"
DEFROUTE="yes"
NAME="eth0" #<==此处改为eth0
DEVICE="eth0"
ONBOOT="yes"编辑/etc/default/grub并加入“net.ifnames=0 biosdevname=0 ”
代码语言：javascript复制# vim /etc/default/grub
GRUB_TIMEOUT=5
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="rd.lvm.lv=centos/root net.ifnames=0 biosdevname=0 rd.lvm.lv=centos/swap crashkernel=auto <==net.ifnames=0 biosdevname=添加到这一行
rhgb quiet"
GRUB_DISABLE_RECOVERY="true"运行命令grub2-mkconfig -o /boot/grub2/grub.cfg 来重新生成GRUB配置并更新内核参数
代码语言：javascript复制# grub2-mkconfig -o /boot/grub2/grub.cfg
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-3.10.0-229.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-229.el7.x86_64.img
Found linux image: /boot/vmlinuz-0-rescue-9f54c77324874c19be7420429678ad1e
Found initrd image: /boot/initramfs-0-rescue-9f54c77324874c19be7420429678ad1e.img
done使用reboot命令重启操作系统，然后ifconfig查看网卡名称已经改成eth0了
代码语言：javascript复制# reboot
# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 #可以看到已经改为eth0了
inet 192.168.1.110 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::20c:29ff:fe75:a9d1 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:75:a9:d1 txqueuelen 1000 (Ethernet)
RX packets 494 bytes 47088 (45.9 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 291 bytes 47105 (46.0 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
